Fire-alarm box.



' A. c. VANADILM FIRE 'ALARM sox. APPLICATIONv FILED AUG. l l. 1916.

Patented Mar. 6, 1917.'`

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ANTHONY C. VANADIA,

,ATENT or FLINT, MICHIGAN.

FIRE-ALARM 'BOX.

Application led August 11,

Vhave invented a certain new and useful Improvement in Fire-Alarm Boxes, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this speciiication.

This invention relates to means for requiringthe attendance until the arrivaloiI the department of one who pulls the {ire- 4alarm box. It consists of anfimprovement over prior handcuff devices intended to trap ones hand within the box when he 4pulls the same.

In the drawingsf.-

Figure 1 is an elevation of the inside of the fire-alarm box door, showing the handcuff device andV its operating parts.

Fig. 2 is a similar View showing the same elements after the box has been pulled and the trap released. l

Fig. 3 indicates how the hand of the one v who pulls the box is trapped in the same.

a indicates the door of the fire-alarm box; Y) a slot therein through which the one who desires to send the alarm must reach in order. to pull the box. v In pulling the box a latch c is retracted, by any suitable means (suc-h means'being old in the art it is not hereby detailed), allowing the yoke or handcuft Z to let go under the influence of the powerful U spring e. In its reciprocation the yoke is guided between the angle bars g provided with lips l1, which serve to guide the same. One side of the yoke is notched Speccaton of Letters Patent.

cation.

Patented Mar. c, 1917.

1916. SeriaI No. 114,322.v

to provide ratchet teeth i over` which may ride the spring detent y' attached to the lower angle bar g. This detent prevents return movement of the yoke so that when the same is sprung upon the wrist of the puller of the box, .the detent prevents the yo-ke being drawn back so as to enlarge the opening to v allow the escape of the wrist.

From the above description it is apparent that I have improved over prior devices of this character byvreason loi the simplicity, eectiveness and cheapness 0f the-device exhibited to accomplish the desired result.

What I claim is: Y

1. In a fire-alarm box, the combination with a closure provided with a slot, a pair of angle bars on opposite sides of the slot, a yoke guided by the angle bars and provided with ratchet-teeth in one arm, a springdetent secured to one of the angle bars and enga ging the ratchet-teeth, a latch for holding the yoke retracted,'and a spring for throwing the yoke partially across the slot where it is locked by the spring detent.

2. In' a fire-alarm box,l the combination with a closure provided ,witha slot, a pair of bars on v opposite sides of the slot, and provided with lips, a yoke guided bythe bars and lipsy and provided with ratchet-teeth in :one arm, a spring detent engaging said ratchetteeth, ahook on one end of the yoke, alatch for engaging saidV hook and holding'the yoke retracted and a U spring normally contracted vand exerting-a pull on the opposite end of the yoke vto throw it across the slot when the latch is released where it is locked by the spring detent.

In testimony whereof, I sign this specifi- ANTHONY 'ci VANADIA.

Copies Vof this patent Ymay be obtained for iive cents each, by yaddressing the Commissioner oi Patents,

Washington, D. C. 

